﻿// COPYRIGHT 2012, Justin Michalczak
//
// This file is licenced to the public under the Apache
// License, Version 2.0 (the "License"); you may not use
// this file except in compliance with the License.
// You may obtain a copy of the License at:
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace CopperVineSoftware.Stackr.Parser.Lexemes
{
    /// <summary>Loop statement which executes a fixed number of times.</summary>
    public class Times : Loop
    {
        private readonly IEnumerable<Statement> body;

        /// <summary>Statements to execute as the loop's body.</summary>
        public IEnumerable<Statement> Body
        {
            get
            {
                return this.body;
            }
        }

        /// <summary>Constructor.</summary>
        /// <param name="body">Statement to execute as the loop body.</param>
        /// <exception cref="ArgumentNullException">If <paramref name="body"/> is <c>null</c>.</exception>
        public Times(IEnumerable<Statement> body)
        {
            if (body == null)
                throw new ArgumentNullException("body");

            this.body = body;
        }

        /// <summary>Retrieves a string representation of this times loop.</summary>
        /// <returns>A string representation of this times loop.</returns>
        public override string ToString()
        {
            return string.Format("times {{ {0} }}",
                string.Join(" ", this.body.Select<Statement, string>((l) => l.ToString())));
        }
    }
}
